Machine for shredding and washing fibrous stock



J. E. LAPPEN. MACH INE' FOR S HREDDING AND W'AS'HIN'GHBRO-US STOCK.

APPLICATION FILED NOV.5. 1920.

1,413,597. Patented Apr.25,1922.

I 50 product preferably reduced to about what is known as ,half stock, with clean long .fibers and commingled; shives.

UNITED'STATES PATENT OFFIQKI JAMES E. LAPBEN', OF SELKIRK, MANITOBA, CANADA.

MACHINE FOB summaries AND WASHING FIBROUS STOCK.

Specification of Iietters Patent.

Application filed November 5, 1920. Serial No.'422,101.

combined shredder and washer, especiallyadapted for use in shredding and washing with a continuous action, various fibrous stocks or materials, such as partly digested cereal straws, flax, hemp, and the like.

While adapted, as above indicated, for

very general use, the improved machine has been especially designed for shredding and washing fibrous stock, consisting of cereal straw and flax or-hemp which have first been softened and partly digested.

In practice, I have hitherto made a very cheap, but highly efficient" heat insulating board of belt by taking one row, or more of the cereal straws, such as wheat, oat, or barley straw, and the whole stems of flax or hemp thrown in natural condition to a digester, and, by the well known alkali process, have treated these commingled stocks until they were softened up and partially degummed. Hitherto, these commingled and softened and partly degummed fibrous substances, 'with the commingled' shives,

would berunthrough abeating engine and further reduced by a beating action that would tear up the fiber so that the felted heat insulating board made therefrom, while it would be hard, would be'ver y brittle, be-

cause of the shortness of the fibers.

this commingled fiber as it comes'from the digester, and by a continuous feeding and shredding action, to separate the shives from the fiber, to comb out the fiber without 'breaking'the same to any considerable extent, and to wash out the dirt, leaving the In their passage through the improved shredder and washer, the several different kinds of fibrous materials,moreover, will be thoroughly commingled, so that the stronger and the weaker fibers will be quite evenly distributed throughout the fibrous mass.

The improved machine is illustrated in the accompanying drawingswherein like Patented Apr. v25, 1922. V

characters indicate like parts throughout'the several views. Referring to the drawings: F 1g. 1 is an end elevation of the improved shredder and washer; Fig. 2 is a vertical section on the line 22 of Fig. 1; and T Fig. 3 is a transverse sectionon the line 8-3 of Fig. 2. s

The shell or body member of the machineisin the form of'a horizontally disposed cyllnder or drum, preferably -made up of lower and upper semi-cylindricalsections 4 and 5 connected by hinges 6 at one side and clamped together at their outer sides with water-tight joints, by means of nut-equipped bolts 7, or other suitable devices. The shell sections is provided with supporting legs 8', and at its ends, with axially located bearings 9, in which is journaled a drum shaft 10. The drum shaft 10, within the shell or casing, carries a shredding drum 11 pro-' vided with radially projecting laterally spaced circumferential rows'of pins or teeth 12 that are arranged to work between relatively fixed pins or teeth 13 that are secured on the lower shell section 4. At one outer or casing, the lower shell section 4 is pro vided with a discharge port 16;which, as

shown, delivers toa discharge spout 17; On its under surface, the upper "shell's'ection 5-is rovided with parallelspira'lly ex- My improved shredderis adapted to taketendedib ades 18. The toothed drum is to be rotated in the direction of the arrow marked adjacent thereto in'Fig. 3, and the spiraltrend of the blades'18 is such that under rotation of the drum in the direction stated, the said blades will produce a procasing. 7 I

For feeding the fibrous stock-lnto the hopper of the casing, I have shown'an endless;

conveyor or elevator belt 19; and for supplying water ina continuous stream: to the casing, I have, shown a valve-equipped pipe 20 arranged to deliver also into the hopper. The fibrous stock will therefore be fed continuously into the hopper, will be progres sively fed through the casing, and after having been shredded and washed and thor- V oughly commingled, will be fed continuously out of the casing. While the-fibrous stock is being shredded, it will be substantially submerged in water, or, at least, therewill be such an amount of water commingled therewith that the shredding or hackling the pins or teeth on the drum, and ,casing will produce the shredding or hackling tion,and in moving through the upper sec tion of the casing, the fibrous stock will be thrown against the spiral propelling blade, and, by the latter, given a progressive teed movement toward the delivery end of the casing.

It is further important to note that the inner edges of 'thewpropelling blades do not extend concentric to the axis of the casing but extend across the same and across the imaginary cylindrical surface described by the outer points of the pins of therotary drum, sothat the stock will be moved gradually into and gradually out of contactwith the edges of said spiral blades. Thisproduces the feeding action without breaking the ,fiber. and without throwing sudden strains on the machine. The" propeller blades also serve to assist in straightening out the fibers of thestock in a direction circumferentially of the drum. Obviously, a continuous stream of water running through the casing, and later on, iromthe fiber, will wash out and carry away the dirt which would otherwise be left in the fiber. Thus a clean fiber stock having long fibers, is produced. I a a I Since thefmachine operates with itcontinuous action, it has'high capacity. lltloreover, it can be driven with comparatively light power, considering the amount ofwork that it will turnout.

and discharge passages, said casingwithin' into cont-act with said blades.

It is, of course, evident'that the teeth on the drum, under rotation ofthe latter, move upward between the propelling blades, so-

that they throw theistock into contact-therewith, but that the teeth or'pins do not come What I claim is: 1. In a machine of the kind'described, the-combination with a casing having inlet having shreddingv pins and spiral propellingrblades, ofga rotary: pin-equipped; shredding drum working within said casing, the

teeth on said casing'andcdrum co-operating to shred the stock, and said propelling blades serving to "progressively feed the stockfro n the delivery toward the receiving passages of said casing. A c I V a 2. In a machine of the kind described,'the combination with a casing having inlet and discharge passages, said casing within having shredding pins and spiial' propelling blades, of a rotary pin-equipped shredd ng drum working within saidcasing, the teeth on said casing and drum co operating to shred the stock, and said propelling blades serving to progressively feed'thestock from the delivery toward the receiving passages of said casing, the shredding pins of said casing being inthe-lower portion thereof, r

and said.- propelling blades being in the upper portion'thereot. V

In a machine of the kind described,the

combination with a casing having inlet and discharge passages, said casing within havblades, of arotary pin-equipped shredding ing shredding pins and spiral'propelling drum working within'said casing,ithe"teeth on said casing and drum co-operating 'to shred the stock, and. said propelling blades serving to progressively feed the stock from the delivery toward the receiving passages of said casing,:ethe inner edges of said propelling blades being extended through the ini- I aginary cylindrical surface described by the outer points of the teethon said drum, and the teeth on said drumbeing arranged to move between said propellingblades. i

41 In a machine of-the kind describedythe combination with a; casing having'inlet and discharge passages, said casing within having shredding pins and spiral propelling blades, of a rotary pin equippedshredding drum working within said casing,theteeth on said casing and druin co-operating to shred the stock, and said propelling blades serving to" progressively feedthe stock'from thed elivery toward the receiving p'assages of said casing, the shredding pins offsaid casingbeing in the lower portion thereof, and said propelling blades beingin'the up-V per portion thereof, the inner ed es of'said propelling blades being extende dthrough the imaginary cylindrical surface described by the outer points of theteeth oir saidr drum, and the teeth onisaid drum being arranged to move between said propelling blades. 1 I

5. ln a machine of the kind described,'the combination with a casing having'inlet and discharge passages, said casing within having shredding pins and spiral propelling blades, of a rotary. pin equipped shredding drum working within saidsca'sing, the teeth. on said casing and:drum cmoperating'to shred the stock, and said propellingblades .servin'gto progressively feed the stock from the delivery toward the receiving passages of said casing, and means for simultaneously delivering the stock ina stream of Water into the inlet passage of said casing.

6. In a machine of the kind described, the combination with a casing having inlet and discharge passages, said casing Within'having shredding'pins and spiral propelling blades, of a rotary pin-equipped shredding drum Working Within said casing, the teeth on said casing and drum co-operating to shred the stock, and said propelling blades serving to progressively feed the stock from the delivery toward the receiving passages of said casing, and means for simultaneously 15V delivering the stock in a stream of Water into the inlet passage-of said casing.

In testimony whereof I affix my signature in presence of two Witnesses.

JAMES, E. LAPPEN.

Witnesses:

C. W. CHAPPEIJJ; PAUL DU VAL. 

